Steve - We do have a number of F5s, but they are at different datacenters, not configured in a cluster. We are seeing the same behavior at each.
I am looking at the statistics on the actual F5s today to see if they show the same pattern. That would rule out any issues with SNMP & MRTG. - Matt On Dec 18, 2012, at 7:00 PM, Steve Shipway <[email protected]> wrote: > That is really weird. We have an F5 too, but don’t experience this sort of > pattern. > > It can’t be a counter reset at midnight, because that would only affect the > first sample after that point. The graphs look almost like two separate > things glued together, rather than a single event at midnight. > > My only guess would be some sort of scheduled task causing a failover. Do > you have several F5 devices in a cluster? If so, it could be that at > midnight (for some reason) one or more groups fail over to the other cluster > member. This would result in fewer connections via the one you’re > monitoring. Maybe check the logs to see if and when any cluster group > failovers happen, or changes between active/active and active/passive on > groups. > > I’d be interested to hear what the eventual resolution for this is. > > Steve > > Steve Shipway > ITS Unix Services Design Lead > University of Auckland, New Zealand > Floor 1, 58 Symonds Street, Auckland > Phone: +64 (0)9 3737599 ext 86487 > DDI: +64 (0)9 924 6487 > Mobile: +64 (0)21 753 189 > Email: [email protected] > P Please consider the environment before printing this e-mail : > 打印本邮件，将减少一棵树存活的机会 > > From: [email protected] > [mailto:[email protected]] On Behalf > OfMathew Marulla > Sent: Wednesday, 19 December 2012 1:16 a.m. > To: [email protected] > Subject: [mrtg] Discontinuity at midnight > > Is it normal to see values jump suddenly at midnight? Is something getting > in SNMP or MRTG getting reset? I am seeing this in both normal and gauge > type graphs. Don't believe there is anything getting reset on the server (an > F5 Big-IP load balancer, in this case). > > - Matt > > <image001.png> > > <image002.png>
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